def test_sleep_duration(self):
assert ThrottledSocket._sleep_duration(10, 5, 5, 6) == 1.0
assert ThrottledSocket._sleep_duration(10, 5, 5, 5.5) == 1.5
assert ThrottledSocket._sleep_duration(10, 5, 5, 6.5) == 0.5
assert ThrottledSocket._sleep_duration(10, 5, 5, 7) == 0.0
